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Fair Value Disclosure (Tables)
12 Months Ended
Dec. 31, 2018
Fair Value Disclosures [Abstract]  
Summary of Levels in Fair Value Hierarchy of Financial Instruments
The following table summarizes the levels in the fair value hierarchy into which our financial instruments were categorized as of December 31, 2018 and 2017 ($ in thousands): 
 
Fair Value as of December 31, 2018
 
Fair Value as of December 31, 2017
 
Level I
 
Level II
 
Level III
 
Total
 
Level I
 
Level II
 
Level III
 
Total
Derivative assets (liabilities), net
$

 
$
23,700

 
$

 
$
23,700

 
$

 
$
(5,644
)
 
$

 
$
(5,644
)